Locomotive.



' LOOOMOTIVE.

APPLICATION FILED JUNE 22, 1908.

Patented Feb. 2, 1909.

3 SHEETS-SHEET 1.

526122271": flea/y ham/ms G.H6HNER.

LOOOMOTIVB.

APPLICATION I'ILED JUN 22, 1908.

Patented Feb. 2, 1909.

a SHEETS-SHEET 2.

11270270: flmlfjlm y f AIM-W Wham/s6 G. HUH'NER.

LOGOMOTIVE.

APPLICATION FILED JUNE 22, 190s.v

91 1,407, Patented Feb. 2, 1909.

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- To all whom it may concern: I 4

the piston and cy nder.

UNITED s'rA'rns PATENT 0am.

I scone nonN'ER, 0F BERLIN, GERMnNY.

Specification of Letters Patent. Application filed June 22,

ratented'lieb. 2, 1909; I 1908, Serial m. 439, 30.

Be it known that I, Guess HinNEn, a subject of the King of Prussia, and resident of Berlin, Prussia, Germany, have invented Improved Means for Automatic-Pressure Compensation in Locomotives, of which the following is a description. My invention relates to locomotives, and particularly to means for preventing the cushioningefiect between the iston and the cylinder when steam' is cut 0 and it is desired that the engine should drift freely.

The invention consists] in the features, combinationand arrangement of parts herein described and particularly pointed out in the claims. I

In the accompanying drawing, Figure 1 is a side view of a part of a locomotive with my invention 'ap lied thereto. -Fig.i2.is.a sectional view through the valve forming part of my invention. 'Fi 3 is a detail view showing a ortion of t e valve and an automatic relie valve therefor. In these drawings "a is the casing of the valve forming a part of my invention, and

b and c are flanged sockets on the said valve casing. 'To these sockets pipes 72. and "1' connect, the said pipes being also connected with the front and rear steam channels of the cylinder of the engine, in which the pis-. ton operates.

d is aflanged socket and d is a steam su ply pipe leading thereto, said steam supp y pipe connecting with a main steam supply pipe (1", which su plies the steam power to e is another flanged socket ,on the valve casing which connects through a pipe e pwith the dry steam casing or dome;v as shown in Fig. 1. lVithin the valve casing a there is provided a piston valve comprising the iston members ff connectedby a rod is. he function of this piston valve is to cut off communication between the pipes h. and i, or to permit saidcommunication to exist according to whether the engine is to be operated under steam pressure or to drift.- When steam is being supplied to thecylinder and piston, steam pressure'will also be supplied through the ip'e d to the upper face of the piston and this will be forced down to obstruct t e passage through the pipes h and 'i, this being effected by the shutting off the ports or passages c, by

\ assuming a position across the inner ends of engine will workinthe ordinary. manner valve f cuts off communication between the steam channels at the front and rear of the these passages. Under this condition the under the pressure of the steam, because the cylinder.- When, however, steam is cut oii' from the cylinder bythe throttle valve, which as-in ordinary practice will cut off the pressure will be sup led to the upper end of lower piston valvef. will be on er pressure of steam through the ipe e and the socket e, and this will force the piston fupwardly, and consequently the piston f will also rise, thus leaving free communication exist" between the passages b and c and therefore between the steam channels atopposite ends Under t ese conditions air or steam in the cylinder will be free to from one end .to the ot er through pipes h drift without resistance being offered thereto by any cushioning action 0 the steam between the end of the piston and the end of the cylinder. v

The piston valve f is provided with openings 9, so that any water of condensation above the piston f or within the same, which it will be noticed is formed hollow, may be allowed to escape, and for controlling this escape I-providean automatic valve consisting of the disk valve a: controlling the aperture leading from the valve casing a. The valve :1: is arranged in a suitable casing as shown in Fig. 3, and is under pressure of. a s ring 2, tending constantly to hold the vave off from itsseat 2' so that there is an escape passage existing from the pas sage "y of the casing y through the crevice y and thence around the valve through the ow when steam pressure is supplied to the upper end of the piston f, this will pass through the passage 3 and close the valve :0 against its seat 2, notwithstanding thepressur of the spring z, butwhen the steam pressure to the upper end of the valve f is cut ofl' then the spring 2 will exert its force and move the valve .1: from its seat 2', thus allowing a free passage to exist bepiston f tween the passage y, the crevice y" and the the piston valve and conseguently theof the c linder through the pipes h and assage formed centrally of the casing 31.,

steam pressure throu h the-pipe d nosteam 1pass back and forth andi and the engine will thus be allowed to passage y for the esca e of any water of condensation that may e present above the valve f.

I claim as my invention:- 1. In comLination with the cylinder'of an engine, conduits connecting with the ends thereof, a valve casing with which said conduits connect, said conduitsbeing in alinement with each other, a double piston valve in the said casing having a portion toextend transversely across the said conduits when in one position, a pipe leadi from the steam supply to one end of the doutle piston valve and a pipe leading from the other end of the douLle piston valve to'the dry steam dome, the said douLle piston valve operating transversely of the said conduits, one portion lying upon one side of the same and the other portion of said valve lying upon the other side of the said conduits when the valve is open, substantially as described.

2. In coml. ination with the cylinder of the engine, conduits connecting with the ends thereof, a valve casin connected with the said conduits, a douo episton valve in the said casing which in one position closes the ear nee? said conduits and in another position opens the same, a pipe leading from the steam supply to one end of one piston, and a pipe leading from the other piston to the dry steam dome, one of said plstons being hollow and having an opening for th lischarge of water, sultstantially as desc'ri'- -a.

3'. in means for automatically compensating the steam pressure in locomotives, the

comLination of a casing a, a conduit k, i, flanged sockets b and cestatlishing connection hetween h and i, a steam supplying conduit d, a flanged socket (i connecting the said conduit 01 with the casing a, another GEORG HQHNER.

Witnesses:

HENRY HASPER, Wonnnnnn Hausa. 

